/* * COM1 NS16550 support * originally from linux source (arch/ppc/boot/ns16550.c) * modified to use CFG_ISA_MEM and new defines */ #include <config.h> #ifdef CFG_NS16550 #include <ns16550.h> #define LCRVAL LCR_8N1 /* 8 data, 1 stop, no parity */ #define MCRVAL (MCR_DTR | MCR_RTS) /* RTS/DTR */ #define FCRVAL (FCR_FIFO_EN | FCR_RXSR | FCR_TXSR) /* Clear & enable FIFOs */ void NS16550_init (NS16550_t com_port, int baud_divisor) { com_port->ier = 0x00; #ifdef CONFIG_OMAP com_port->mdr1 = 0x7; /* mode select reset TL16C750*/ #endif com_port->lcr = LCR_BKSE | LCRVAL; com_port->dll = baud_divisor & 0xff; com_port->dlm = (baud_divisor >> 8) & 0xff; com_port->lcr = LCRVAL; com_port->mcr = MCRVAL; com_port->fcr = FCRVAL; #if defined(CONFIG_OMAP) #if defined(CONFIG_APTIX) com_port->mdr1 = 3; /* /13 mode so Aptix 6MHz can hit 115200 */ #else com_port->mdr1 = 0; /* /16 is proper to hit 115200 with 48MHz */ #endif #endif } void NS16550_reinit (NS16550_t com_port, int baud_divisor) { com_port->ier = 0x00; com_port->lcr = LCR_BKSE; com_port->dll = baud_divisor & 0xff; com_port->dlm = (baud_divisor >> 8) & 0xff; com_port->lcr = LCRVAL; com_port->mcr = MCRVAL; com_port->fcr = FCRVAL; } void NS16550_putc (NS16550_t com_port, char c) { while ((com_port->lsr & LSR_THRE) == 0); com_port->thr = c; } char NS16550_getc (NS16550_t com_port) { while ((com_port->lsr & LSR_DR) == 0) { #ifdef CONFIG_USB_TTY extern void usbtty_poll(void); usbtty_poll(); #endif } return (com_port->rbr); } int NS16550_tstc (NS16550_t com_port) { return ((com_port->lsr & LSR_DR) != 0); } #endif